如何从数组中选择json项

for (i = 0; i < 3; i++) {
    alert(JSON.infos.info[0].note.notes[i].title);
}

var JSON = {
    \"infos\": {
        \"info\": [
            {
                \"startYear\": \"1900\",
                \"endYear\": \"1930\",
                \"timeZoneDesc\": \"daweerrewereopreproewropewredfkfdufssfsfsfsfrerewrBlahhhhh..\",
                \"timeZoneID\": \"1\",
                \"note\": {
                    \"notes\": [
                        {
                            \"id\": \"1\",
                            \"title\": \"Mmm\"
                        },
                        {
                            \"id\": \"2\",
                            \"title\": \"Wmm\"
                        },
                        {
                            \"id\": \"3\",
                            \"title\": \"Smm\"
                        }
                    ]
                },
                \"links\": [
                    {
                        \"id\": \"1\",
                        \"title\": \"Red House\",
                        \"url\": \"http://infopedia.nl.sg/articles/SIP_611_2004-12-24.html\"
                    },
                    {
                        \"id\": \"2\",
                        \"title\": \"Joo Chiat\",
                        \"url\": \"http://www.the-inncrowd.com/joochiat.htm\"
                    },
                    {
                        \"id\": \"3\",
                        \"title\": \"Bake\",
                        \"url\": \"https://thelongnwindingroad.wordpress.com/tag/red-house-bakery\"
                    }
                ]
            }
        ]
    }
}

var infoLength= JSON.infos.info.length;

for (infoIndex = 0; infoIndex < infoLength; infoIndex++) {

    var notesLength= JSON.infos.info[infoIndex].note.notes.length;

    for (noteIndex = 0; noteIndex < notesLength; noteIndex++) {

        alert(JSON.infos.info[infoIndex].note.notes[noteIndex].title);

    }
}

obj

obj.infos.info[0].note.notes[0].title

notes

json.infos.info[0].note.notes;

var notes = json.infos.info[0].note.notes;
var titles = [];
for (var i = 0, len = notes.length; i < len; i++)
{
   titles.push(notes[i].title);
}

alert(\'titles is: \' + titles.join(\', \'));

// Assuming your using \"success\" in ajax response
success: function(json)
{
    var titles = $(json.infos.info[0].note.notes).map(function() {
        return this.title;
    }).get();
    alert(titles.join(\', \'));
}

var len = jsonobject.infos.info.note.notes.length;

var title = jsonobject.infos.info.note.notes[i].title;